Jenna Elfman (Dharma & Greg) will guest-star in the Season 2 finale of the Showtime dramedy as Jill, “a woman with a dangerous past and an awkward present,” AOL TV reports.

Other recent gets for the dysfunctional family drama’s second season include James Wolk (Lone Star) as an investment executive who makes a connection with Emmy Rossum’s Fiona, and Zach McGowan (Body of Proof) as a love interest for Karen (Laura Wiggins).

Shameless returns Jan. 8 at 9/8c. To make the wait more bearable, check out a Showtime promo pairing Rossum with Kristen Bell, who stars in House of Lies, the new series that will be leading out of Shameless.